Tack-delivering nozzle



(No Mode.)

0. E. STEWART. TACK DELIVERING NOZZLE.

PatentedJune 9, 1896.

INVENTDRI e WTNEEIEES WMZ@ JM.

UNITED STATES PATENT Enron.

CHARLES E. STEVART, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE BOSTON LASTING MACHINE COMPANY, OF MAINE.

TACK-DELIVERNG NOZZLE.

SPECIFICATION forming part of Letters Patent No. 561,832, dated June 9, 1896.

Application iileil March 21, 1895. Serial No. 642,606. (No model.)

To au whom, it may concern.-

Be it known that I, CHARLES E. STEWART, of Boston, in the county of Suffolk and Stat-e of Massachusetts, have invented certain newr and useful Improvements in Tack-Delivering Nozzles, of which the following is a specification.

This invention relates to tack-deliverin g devices for use in machines adapted to drive tacks into boot or -shoe uppers and soles in the operation of lasting, the machine having a tack-delivering nozzle which receives the tacks one at a time and holds them for the action of a reciprocating driver which is forced up into the nozzle and drives the tack therefrom into the upper and sole of a shoe mounted on a last and presented to the lower end of the nozzle. In a machine of this class the depth to which the tacks are driven is determined by the relative positions of the work-supporting end of the nozzle and the end of the driver when the latter is at the extreme of its downward movement. It is Otten desirable to vary the depth of penetration of the tack, or, in other words, the projection of the head of the tack above the outer surface of the upper, some kinds of work requiring a greater projection of the tack-head than others. In some kinds of work it is desirable to drive the tacks more deeply at the heel portion than elsewhere, in order that the heel-tacks may remain in place in the completed boot or shoe after the lasting operation, the other tacks being pulled out.

It is the object of my invention to provide means whereby the operator may quickly vary the length of the tack-delivering nozzle, so that it will vary the depth of penetration of the tacks, in order that the desired variation in the projection of the tack-heads may be secured; and to this end the invention consists in a telescopic tack-delivering nozzle comprisin g two members or sections, one oi' which is movable upon the other to lengthen and shorten the nozzle, and means for supporting the movable member in the different positions to which it may be adjusted.

Of the accompanying drawings, forming a part of this specification, Figure l represents a side view of a tack-delivering device e1nbodying my invention, the adjustable member being shown in its raised position to cause the maxim um depth oi penetration of the tack. Fig. 2 represents a similarview showing the adjustable member in its depressed position to can se the minimum penetration of the tack. Fig. S represents a section on line 3 3 of Fig. l. Fig. 4 represents a section on line l -l of Fig. 2.

The same letters of reference indicate the saine parts in all the figures.

In the drawings, a represents a tack-delivering nozzle, which is adapted to be secured to a suitable part of a lasting or tack-driving machine, the said nozzle being here shown as screw-threaded at its upper portion and screwed into a socket in an arm or holder l), which constitutes a part of the machine.

As my invent-ion relates wholly to the taekdelivering device I deem it unnecessary to describe the driving mechanism and other parts of the machine, it being sufcient to say that the nozzle is supplied with tacks one at a time and supported so that the reciprocating` driver r alternately enters and is withdrawn from the nozzle.

The nozzle is of telescopic construction, and comprises the body member d and an adj ustable member or foot c, which is movable lengthwise upon the member d to lengthen the nozzle, as shown in Fig. at, and shorten the nozzle, as shown in Fig. Means are provided whereby the movable member or foot may be supported in either of the positions shown, said means being preferably as next described.

To the member CL is affixed a cam-shaped collar a', having two projections a?, each having an inclined face a3, said collar being preferably formed as a nut screwed upon the threaded part of the member d and constituting a stop against which the adjustable memberor footcis yieldingly held by a spring d., interposed between shoulders or bearings formed on the said members. The foot c is provided with two projections c2, each having an inclined face c3, said projections being preferably formed on an externally-milled and internally threaded collar c', screwed upon the upper portion of the foot c. Then IOO lock and cooperate with the spring d in securing the foot in a raised position, permitting the upper e to be held so that the driver o" will drive the tacks to the maximum depth. When the foot is turned to the position shown in Figs. 2 and 4, the inclined faces a3 cscause a depression of the foot, so that the upper e is correspondingly depressed and the heads of the tacks are left projecting.

I prefer to provide one of the projections a3 with a downwardlysprojecting dovvel a4, which interlocks with a cavity c4, as shown in Fig. 3, When the foot is in its raised position, and With a cavity c5, as shown in Fig. 4, When the foot is in its depressed position, the foot being thus prevented from turning accidentally from one position to the other.

It Will be seen that when the operator desires to changethc position of the foot he iirst slightly depresses it to separate the dowel a4 from the corresponding' cavity and then turns the footf until its position is changed by the conjoint action of the spring and projections.

I do not limit myself to the described devices for holding the adjustable member or foot in the diilerent positions to which it may be adjusted and may employ any other suitable means for securing the desired result.

The cam-shaped collar d maybe consid-r ered a bearing of varying height, which determines the height of the foot c by the rotary adjustment of the latter, the rotation of the foot quickly changing its height.

I claiml. A tack-delivering nozzle comprising telescopic members, one rotatable and movable longitudinally uponthe other, and a bearing of varying height whereby said movable member is moved longitudinally when rotated.

2. A tack-delivering nozzle having a camshaped collar, an adjustable foot or extension, and a springpwhereby said foot is yieldingly pressed against said collar.

A tack-delivering nozzle having a camshaped collar, an adjustable foot or extension having cam-shaped projections, and a spring whereby the projections of the foot are pressed yieldingly against the said collar.

4. A tack-delivering nozzle having a foot or extension which is rotatable and movable longitudinally on the nozzle, interlocking projections on the nozzle and foot, and a spring Whereb y said projections are yieldin gly pressed together,said projections having cams or inclines which cause a longitudinal movement of the foot when the latter is partialljr rotated on the nozzle.

Y In testimony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, this lst d ay of January, A. D. i895.

CHARLES E. STEVART. lVitnesses:

C. F. BROWN, A. D. HARRISON. 

